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Code Issues Releases Wiki Activity

use standard-width types and remove pressure ambiguity in protocol documentation

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Jarrad Whitaker 2015-11-27 23:02:18 +11:00
parent 5865d3c81e
commit bf674e5203
1 changed files with 13 additions and 13 deletions
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26
doc/protocol.txt
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@ -2,26 +2,26 @@ Network protocol used by GfxTablet
Version 1 Version 2
--------- ---------
GfxTablet app sends UDP packets to port 40118 of the destination host. GfxTablet app sends UDP packets to port 40118 of the destination host.
Packet structure, uses network byte order (big endian): Packet structure, uses network byte order (big endian):
9 bytes "GfxTablet" 9 bytes "GfxTablet"
1 word version number 1 unsigned int16 version number
1 byte type: 1 byte event type:
0 motion event (hovering) 0: motion event (hovering)
1 button event (finger, pen etc. touches surface) 1: button event (finger, pen etc. touches surface)
1 word x (using full range: 0..65535) 1 unsigned int16 x (using full range: 0..65535)
1 word y (using full range: 0..65535) 1 unsigned int16 y (using full range: 0..65535)
1 word pressure (using full range 0..65535, 32768 == pressure 1.0f on Android device) 1 unsigned int16 pressure (accepting full range 0..65535, but will clip to 32768 == pressure 1.0f on Android device)
when type == button event: when type == button event:
1 byte number of button, starting with 0 1 signed int8 number of button, starting with 0
1 byte button status: 1 byte button status:
0 button is released ("up") 0 button is released ("up")
1 button is pressed ("down") 1 button is pressed ("down")